Car truck-bolster.



PATENTED JAN. 9, 1906.

G. C.. MURRAY. GAR TRUCK BOLSTER.

APPLICATION FILED JUNE 19, 1905.

/ atkybnu UNITED STATES PATENT OFFICE.

CAR TRUCK-BOLSTER.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed .Tune 19,1905- Serial No. 266.054.

To a/ZZ whom, 25 may concern.

Be it known that I, GEORGE C. MURRAY, residing at Vashington, District of Columbia, have invented certain new and useful Im provements'in Car Truck-Bolsters, of which the following is a specification, reference being' had therein to the accompanying' drawings.

This invention relates to truck-holsters for railway-cars.

The object of the invention is to produce a truck-bolster in which there is a combination oi' a compression member and a tension member, the compression member being' of cast metal and having its proportions arranged with special relation to the resistance expected from such member and the tension member, preferably a rolled or drawn bar, arranged to tie said compression member and to brace the same by the king-post inclosed between the compression and tension members; also, to provide removable seats for the springs.

The invention consists in certain constructions and combinations of elements, substantially as hereinafter described and claimed.

Figure 1 is a plan view of the bolster with parts in section or broken away. Fig. 2 is a partial side elevation and partial longitudinal section of same. Fig. 3 is an end elevation of king-post. Fig-4 is an end view of the bolster. Fig. 5 is a top plan of the springseat.

The casting 1 is the compression member and is nearly as long as the completed bolster. It has a loor-plate 2, which has a central cup 3 for the reception of the swivel-bearing and king-bolt, as usual. The floor-plate 2 merges into the vertical side webs 4 4, which webs are of such width as may be necessary or desirable in proportion to the load. These webs are preferably wider at the outer ends than toward the center of the bolster. The webs 4 are connected by cross-rib 5, and a middle rib 6 may also be provided. The floor 2 has cups 7 near each end, in which cups bufferblocks 8 may be inclosed, and caps 9 may project above the cups to serve as bearings for the car-body when applied. The floor 2 dro ps downward to form rib 5 near each end of casting 1, andan inclined web 15 extends both front and rear of the downward portion of the iioor, being integral therewith. The floor thus has depressions near each end, which depressions receive the ends of the tension member. The inclined web 15 is perforated in being integral therewith and with the side webs 4. The king-post 2O has vertical ribs 21, and these ribs are strengthened by Y- shaped webs 22. The upper end of the kingpost has lugs 23, which rest against bearings 24 under cup 3 to retain the casting 1 and king-post in proper relative position. The lower end of the king-post is formed into a saddle 25, which saddle rests on the tension member or bar 30, the saddle having flanges 26 at the sides of said bar. The bar 30 is preferably of rolled metal. It extends from end to end of the bolster-body, being turned over the web 15 at the ends of the casting 1 and being riveted to said web 15 both inside and outside the depression in the floor 2. The side webs `4 project at the `sides of bar 30 where said bar makes contact with the web 15. By this arrangement of a cast compression member 1 and a wrought or rolled tension member 30 the truss members are made of very great strength. To increase the strength of the bolster, it is only necessary to widen the webs 4.

To afford a suitable seat for the car-springs, I apply a seat plate or bearing 40 at each end of the bolster. This seat for the springs isa casting having a horizontal Hoor-plate 41 and ribs 42, projecting upward therefrom, the upper edges of said ribs resting against the lower face of bar 30, where said bar embraces web 15. The seat 40 has an upturned web 43 and side flanges 44, which flanges are riv- Y eted to the webs 4 near the ends of the bolster. The spring-seats 40 are held to the bolster by the rivets 46, which rivets pass through bar 30 and web 15. The upturned web 43 presents an inclined surface atv the outer end of the bolster, which turns ofi' rain and dirt and is a convenient surface for an inscription, such as name, weight, strength, &c. Ribs 48 at the lower edge of the seat-plate 40 extend under the edges of the webs 4 and insure the solidity of the spring-seat.

The ribs 50 at the sides of the bolster are of usual construction to embrace the bodyframing.

By making the spring-seat 40 detachable slight changes can be made in such seat to adapt it and the bolster for use with various kinds of springs in common use, the remaining parts of the bolster remaining unchanged. What I claim is- 1. In a car truck-bolster, an integral castmetal compression member having a door and vertical side iianges extending at the ends of IOO IIC

the bolster beyond said floorQa tension member embracing the ends of the oor and embraced between said langes at the ends of the iioor, and separate spring-seats secured to both said members and lying between the vertical flanges.

2. In a car truck-bolster, the compression member consisting of a floor having a depression near each end and a vertical web at each side thereof extending beyond the ends ofV the floor, an inclined web extending in front and rear of the depression of the floor, and ribs connecting the inner end of the inclined web t0 the floor proper, all being integral.

3. In a car truck-bolster, the combination of a cast-metal compression member having a floor with depressions near the ends and inclined webs under the same, a central king- GEO. C. MURRAY.

Witnesses:

W. A. BARTLETT, CHAs. K. DAvIEs. 

